Skiving-machine.



A. LATHAM.

smvme MACHINE. APPLICATION FILED FEB-12.19M-

Patented Apr. 22,1919.

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3 w w L MNH w G 7 RN 1 1 1 1mm psi; m. FNOro- A. LATHAM.

SKIVING MACHINE.

APPLICATION FILED FEB. 12. 191B.

Patented Apr. 22,1919.

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A. LATHAM.

SKIVING MACHINE.

APPLICATION H'LEp FEB. 12. 1913.

Patented Apr. 22, 1919.

5SHEETS-SHEET 4.

A LATHAM SKIVING MACHINE.

' APPLICATI-ON FILED FEB. 12. 1918.

1,301,283. Patented Apr. 22,1919. 5 SHEETSSHEET 5 W a p k w mm Qm Wlness- ITED STATES PATENT @F TQE.

ALBERT LATHAM, .015 BEVERLY, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, OF PATEBSON, NEW JERSEY, ACOBPORATION or new JERSEY.

, SKIVING-MACHINE.

Specification of Letters Patent. Patented Apr, 22, 1919.

Application filed l ebruary 12, 1918. Serial No. 216,734.

To all whom it may concern Be it known that I, ALBERT LATHAM, a citizen of the United States, residing at Beverly, in thecounty of Essex and State of Massachusetts, have invented certain new and useful Improvements in Skiving-Machines; and I do "hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use thesame.

The present invention relates to skiving machines and more particularly to machines of this character employed for operation upon the uppers of boots and shoes.

Machines of this type are employed primarily for skivingor bevelingthe marginal portions of shoe uppers and as these uppers are composed of thin flexible material it is a matter of some considerable difiiculty to produce the even, uniform bevel edge which is desiredy The object of the invention is to produce a machine which shall perform the requisite operations with extreme accuracy and main tain this accuracy of operation through long continued use. lVith this object in view, the severalfeatures of theinvention consist in certain new and useful features of construction, together with combinations and arrangements of parts operating in a novel manneiyall the advantages of which will be obvious to those skilled in the art from th following description.

In the accompanying drawings illustrating the preferred form of the invention, Figure 1 represents a front elevation of a machine embodying the several features of the invention; Fig. 2 is an end elevation of the machine shown in Fig. 1; Fig. 3 is a top plan view of the machine shown in Fig. 1; Fig.4 is a view showing the hinged head of the machine thrown back and illustrating a bottom plan View of the contained mechanismjF'ig. '5 is a detail. illustrating a cross section of the feed roll and operating mechanism; Fig. 6 is a detail showinga cross section of' the feed roll drive taken upon the line 66 of Fig. '5; Fig. 7 is a detail showing a section of the feed roll support taken upon the line 7, 7 of Fig. 2; and Figs. 8 and 9 are details showing a cross section upon the line 8-8, of Fig. 3 and illustrating the latch in two different operative positions.

The skiving machine shown in the illustrated embodiment of'the invention comranged to bear upon the upper end of the stem 15. The latter is yieldingly maintained in contactwith the screw by a spring 19 supported at its lower end upon a cross bar 20 secured to the arm 17 and received in a slot formed in the stem. The angle of the bevel formed by the skiving knife is varied in the usual manner by adjusting the gage member transversely of the knife so that the curved face 21 of the member intersects the knife edge at a different point. This adjustment ,of the gage member-is facilitated through the provision of a stem 23 passing loosely throughthe gage member and slide l tqand having its end threaded in a nut 24 received in a recess formed in the backof the slide. An arm 25, secured to. the front end of the stem, serves as a means for operating the "stemto clamp the gage memberto the head. The construction is so designed that approximately a. quarter .rotat-ionof the stem serves to clamp the gage member to the head. The nut 24: is provided with a fluted edge 26, as shown clearly in Fig. 2 of the drawings, which is engaged by a threaded pin 27 toprevent' the nut from turning with the stem 23. By removing the pin 27, however, the nut may be manipulated so that the clamping position of the arm 25 is that shown in the drawings in which the arm extends substantially 'verti cally and does not interfere with the free operation of the machine. Amovement of thearm from this posltion into a position n engagement with the stop pin 29 serves to ing surface of the feed roll. During the operation of the machine the feed roll is continuously rotated to feed the work to the knife edge and it is essential that this mechanism shall serve to drive the roll at a uniform speed and in any position of the roll. The feed roll 12 is secured to a shaft 31 journaled at opposite ends in a head 33 pivoted upon a carrier 34 at 35. The feed roll is normally positioned, as shown in the drawings, with the surface concentric with the knife edge through the provision of cooperating stop faces 37 and 38 formed upon the carrier. and head, respectively, and is permitted to yield from this position about the pivot 35 through the provision of a spring 39 received in arecess 40 formed in the carrier and positioned beneath a flange 41 formed upon the head. The pressure of the spring may be regulated by a plug 42 threaded in the carrier and upon which the spring 39 rests. The carrier 34 is pivoted upon a stud 43 which is alined with the axis of the knife and is rocked about this stud shaft by an arm 45 having aspring pressed detent 46 in its free end which engages with one of a series of recesses 47 to retain the arm in adjusted position. The purpose of this construction is to vary the position of the feed roll beneath the gage member so that if any portion of the surface is rendered ineflicient by the accumulation of material thereon, another portion of the surface becomes available. The stud shaft 43 is mounted in a frame 50 which is fulcrumed upon a shaft 52 supported at its opposite ends in the frame of the. machine. The frame 50 is provided with a depending tail 53, as shown in Figs. 2 and 7 of the drawings, which engages at its lower end with an eccentric stud 54 journaled in the machine frame and having a knurled head 55 upon the outer end. This stud extends parallel to the. shaft 52 and through its engagement with the tail 53 determines the angular position of the frame 50 and the feed roll 12 carried thereby. The tail 53 is yieldingly retained in engagement with the stud by a spring 55 received within a hollow boss 56 formed upon the machine frame and surrounding a stem 57 having a ball-shaped end 58 which is connected to the tail 53 through i a correspondingly shaped socket formed in the tail. The pressure of the spring is regulated by a cap 60 threadedly connected to the end of the stem 57 and having an annular shoulder 61 against which the spring 55 bears. The cap is provided with the usual hexagonal head 62 for the reception of a wrench or other instrumentality. With this construction the feed roll is initially adjusted to bring the surface of the roll into close proximity with the knife edge and is yieldingly retained in this position. During the operation of the machine the feed roll is permitted to yield bodily away from the knife edge or to tip angular-1y about one end to accommodate material of varying thickness. After the initial adjustment of the feed roll has been secured the eccentric stud 54 is clamped in position by a locking member 64 threaded in the machine frame and having a pointed end which engages with an annular'groove 65 formed in the stud 54, as shown clearly in Fig. 6. A transverse. adjustment of the feed roll to aline theshaft 43 with the knife shaft is secured by bodily adjusting the frame 50 and the parts carried thereby. As shown in Figs. 2 and 3, the frame 50 is held against longitudinal movement relative to the shaft 52 by, a collar 67 pinned to the shaft and received in a slot formed in the hub of the frame.

The shaft 52 is threaded into the machine frame at 68 and is provided with a lock nut 69 to retain the shaft in adjusted position. With this construction in case the feed roll is not initially positioned so that the surface is concentric with the knife edge the threaded connection of the shaft 52 with the machine frame is utilized to adjust the frame 50 and the feed roll carried thereby transversely with relation to the skiving knife after which the lock nut 69 is tightened to clamp the parts in adjusted position. This adjustment, as well as the adjustment secured by the eccentric stud 54, is intended merely for convenience in assembling the machine to locate the feed roll in the proper.

operative relation tothe skiving knife.

The part 71 carries the feed roll and operating mechanism and is designed to expose the interior of the knife when it is swung away from the part 70 about the hinges 73. The feed roll drive. shaft 74 illustrated in Figs. 3 and 4, is journaled in the base portion 70 of the machine frame and is provided with the usual pulley 75 which is operated from the knife shaft 76 through a drive pulley 77 and connecting belt 78 at the back of the machine frame The front end of the feed roll shaft 74 is provided with a clutch face indicated at 80 which engages with and drives a correspondingly shaped clutch face 81 formed upon the end of a shaft 82 journaled in the swinging portion 71 of the base. When the base is closed the two shafts are positioned in alinement with one another and through the 7 10b Thehead of the machine is conveniently made in twopa'rts 70 and 71. hinged at 73.

the machine frame. A sliding block 92 is splined within the sleeve 90 and is connected to the shaft 31 of the feed roll by a rod 9% havingball-sihaped ends-95 connected to the block and shaft 31, respectively, by transverse pins 96 received in longitudinal slots 97 formed in the ball ends; This construction provides a simple and efficient mechanism for connnum'cating the rotary motion of the feed rolldrive shaftto the feed roll in any position of thelatter, the block 92 sliding within the sleeve 90 and the connecting rod 9% assuming an angular position dependent upon the varying positions of the feed roll. A longitudinal play of the connecting rod 94 is prevented through the provision of a washer 100 of felt or other suitable material which is received within the end of the block 92 in a position to engage with the ball end 95' of the rod.

As stated previously, the interior of the skiving knife is conveniently made acces sible by swinging back the portion 71 of the head whichcarries the feed roll and connected parts. "By exposing the interior of the knife in this manner any accumulation of skivings or othermaterial may be readily removed without stopping the machine. It is advisable, however, to insure that the feed roll does not engage with the knife edge when the portion 71"ofthe head isflopened or closed. To this end connected mechanism is 1- provi-ded for locking thetwo portions 7 O and 71 of the'head together andfor automatically depressing the feed roll when the two portions are unlocked to permit openingof the head. A latch arm 105 is secured to shaft 106 outside of the ma chine-frame. The shaft 106iisprovidedwith a cam 108, on its inner end, as shown in Figs. 1 and 3', which engages with the lower end of a depending arm 110 secured to the rocking framefi50i When the latch arm 105 rests against the stop 111 to lock the two portions of the head together, the feed roll is-supported in' the normal operative position in close pro-Kim.- ity to the knife edge but when the latch arm is swung into position against the pin 175 to unlock'the two portions of the head the mm 108 rocks the arm 110 and frame 50 to depress the feed roll. The-latch arm is provided with a hub 107 which has an interrupted flange 109' adapted to engage a lug 176 formed-upon a stationary locking bar 177. When the arm rests against" the pin 175-theopening in theflange is a lined with the lug 1'76 to permit the two portions of the head .to be closed and when the latch arm is swung into a horizontal position the flange which is slightly eccentric engages the lug and draws the :two parts ofthe head tightly together as shown in Figs. 8 and 9. l

V The skiving'knife is of the built-up type in whicha thin, tl ea'ible lmife blade is clampedto &

an external holder through suitable clamping mechanism actuated from the opposite end of the knife shaft. As shown in Figs. 1 and 4 of the drawings, the knife blade 11 1 is clamped within aholder 115 and the clamping and adjusting mechanism is actuated from the. opposite end of the shaft through suitable hand wheels 116 and 117. The specific form of the skiving knife embodied in this machine is that disclosed in the co-pendin application of applicant filed of even date herewith. I

It is of extreme importance that the knife blade shall be accurately ground upon opposite sides in order that all parts of the cutting edge of the knife shall lie exactly in the true circle of rotation of the knife. It is furthermore desirable that a keen cutting edge shall be constantly maintained without undue grinding of the knife blade, thus conserving the effective life of the blade and increasing the efficiency. According to the present invention the opposite surfaces of the kn1fe blade when positioned in the machine are engaged by rotary grinding members to form a cutting edge which is not affected by irregularities in the thickness of the blade. The outer grindingmember is positively held in engagement with the surface of the knife and the inner grinding member is yieldingly retained in engagement with the knife, the movement of the member toward the knife beinglimited-by an adjustable stop. According to the usual practice the stop for the innergrinder is adjusted to form a more or less continuous engagementlof the grinding member with the knife blade which graduallygrinds away anybur or inequalities which may be present in the surface of the blade. As illustrated in Fig". 4 of the drawings the outer surface of the knife blade is engagedby a grinding member which comprises an annular ring 112 of abrasive material secured to a disk 118 supported for rotation in a plane inclined to that of the knife shaft in order that the outer surface of the blade shall be ground upon a bevel. The disk 112 is mounted upon the inner end of a shaft 119 journaled in a bearing yoke 120 adjustably secured to the end of an arm 121. The bearing yoke is provided with a projection 122 having a curved slot 123 which receives a threaded fastening 124 secured to the arm 121, and permits an angular adjustment of the bearing yoke and grinding member carried thereby about an axis passing substantially through the point of contact between the grinding disk and knife blade. The arm 121 is pivoted at 125 to a lug 126 formed upon the portion of the machine frame and is actuated to move the grinding member toward and from the knife blade by a rod 128 which passes through the side of the head and is provided with an actuating knob 130 upon its outer end. The inner end of the rod 128 threadedly engages with a nut 131 swiveled within a boss 132 formed upon the arm 121. In order to gage the movements of the grinding disk an indicator 133 is clamped upon the hub of the knob 130 and the latter is provided with a serrated inner face engaged by a spring pressed detent 134 all as shown in Fig. 3. The grinding member is rotated during the operation of the machine from the knife shaft 7 6 through a drive pulley 136 ecured to the knife shaft whichoperates the member through a belt 137 and driven pulley 138 secured to the shaft 119. The belt 137 passes around guide pulleys 140 journaled upon the outer end of an arm 141 which is pivoted to the machine frame at 142. The arm 141 may be moved to regulate the tension upon the belt or stop the rotation of the grinding disk through an adjusting screw 143 threaded in the side of the machine frame and engaging at its inner end with a short arm 144 projecting from the arm 141. WVith this construction the grinding operation may be halted without disturbing the adjustment of the grinding disk by merel manipulating the screw 143 to relieve the tension upon the driving belt. The inner surface of the knife blade is engaged by the face of the grinding disk 150 which is rotated through contact with the moving knife blade andis adjusted to regulate the grinding action through knurled members 151 and 152. This grinding disk is suppo-rted'in a head -153 adjustably secured to the outside of the machine frame in such a manner that the position of the grinding member may be regulated to cause the face of the member to engage with the moving knife blade at two points. This construction is disclosed in the pending application of applicant Serial No. 45,402, filed Au ust 13, 1915. 1

In order to adord convenient access to the interior of the head as a whole the latter is hinged at 155 upon a base member 156 and may be swung back bodily as shown in Fig. 4. 4

While it is preferred to employ the specific construction and arrangement of parts shown and described, it Will be understood that this construction and arrangement is not essential except so far as specified in the claims, and may be changed or modified without departing from the broader features of the invention.

The invention having been described, what is claimed is: 1-

1. A skiving machine having, in combination, a tubular skiving knife, a gage member upon one side of the knife, a feed roll upon the opposite side of the knife, a pivoted carrier supporting the feed roll to permit a circumferential adjustment of the roll relative to the knife, and means for sup-porting the the carrier andfeed rolltransversely of the knife.

3. A skiving machine comprising a skiving knife, a. feed roll and cooperating gage member positioned upon opposite sides of the knife, means for supporting the feed roll in a predetermined operative relation to the knife edge, and means for varying the predetermined positionof the feed rollincluding a rotary eccentric member.

4. A. skiving machine comprising a feed roll, apivoted frame supporting the feed roll,,an arm g rojectingv from. the frame, and a rotary eccentric engaging with the free end of the arm and adapted to determine the normal position of the feed roll. 7

5. A skiving machine comprising a tubular skiving knife,"a feed-rol1,.meansfor supporting the feed roll including a frame piv- Oted to rock about an axis extending transverselyto the axis of rotationj ofctheknife, and'meansjfor locating the feed roll ina predetermined operative position including an eccentricmember havingan axisof r0 tation parallel to the rocking axis ofthe frame, and means for yieldingly. retaining the frame in contact with. the eccentric member. f i

6. A skiving machine having, in combination, a tubular skivinggknife, cooperating 7. jA skiving machine comprising a tubu lar knife, a grinding disk disposed in operative relation to the outer surface of the knife, a pivoted armsupporting the disk, means for adjusting the disk angularly with respect to the arm, and means for rotating the disk. 3" 1" I ,7

8. A skiving machine comprising a tubu lar skiving knife, a grinding disk supported in operative relation to'the outer surface of the knife, a headupon which, the disk 'is journaled, a pivoted arm, and adjustable connections between the head and arm adapted to permit adjustment of the head and grinding disk carried thereby about an axis passing substantially through the point of engagement of the grinding disk and the skiving knife.

9. A skiving machine comprising a tubular skiving knife, a feed roll normally located in close proximity to the knife edge, a head inclosing the knife and feed roll and including two hinged parts, a latch for looking the two parts of the head together, and means for moving the feed roll away from the knife edge when the latch is released.

10. A skiving machine comprising a tubu lar skiving knife, a feed roll normally positioned in close proximity to the knife edge,

a head inclosing the feed roll and knife and including two parts hinged together, and

means under the control of the operator for bodily moving the feed roll away from the knife edge.

11. A skiving machine comprising a head having two hinged parts, a skiving knife mounted in one part of the head, a feed roll mounted in the cooperating part of the head, means for normally supportlng the feed roll in close proximity to the knife, and means under the control of the operator for removing the feed roll from the knife edge to insure against engagement of the feed roll with the knife edge when the head is opened and closed.

ALBERT LATHAM.

Copies of this patent may be obtained for five cents each, by addressing the commissioner of Patents, Washington, D. G. 

